The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

Tiny memorials honor individual victims of the Holocaust.

The final resting place of many of Germany's most famous communists.

One of downtown Berlin's last reminders of its Communist past.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

This conical hill was built as a testing ground for an engineer known as the Glider King.

Berlin's old airport.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A wunderkammer of mysterious objects and stories.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.